magento-test/app/code/Magento/Cms/Test/Mftf/ActionGroup/DeleteCMSBlockActionGroup.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
    <actionGroup name="DeleteCMSBlockActionGroup">
        <annotations>
            <description>Goes to the Admin CMS Blocks page. Deletes the '_defaultBlock' Block. Validates that the Success Message is present and correct. PLEASE NOTE: The Block that is deleted it Hardcoded.</description>
        </annotations>

        <amOnPage url="{{CmsBlocksPage.url}}" stepKey="navigateToCMSPagesGrid"/>
        <waitForPageLoad stepKey="waitForPageLoad"/>
        <click selector="{{CmsPagesPageActionsSection.select(_defaultBlock.title)}}" stepKey="ClickOnSelect"/>
        <click selector="{{CmsPagesPageActionsSection.delete(_defaultBlock.title)}}" stepKey="ClickOnEdit"/>
        <waitForPageLoad stepKey="waitForPageLoad3"/>
        <click selector="{{CmsPagesPageActionsSection.deleteConfirm}}" stepKey="ClickToConfirm"/>
        <waitForPageLoad stepKey="waitForPageLoad4"/>
        <see userInput="You deleted the block." stepKey="VerifyBlockIsDeleted"/>
    </actionGroup>
</actionGroups>